Shaking-screen.



C. V. WRIGHT.

SHAKING SCREEN.

APPLICATION man OCT. 5. 1916.

1,228,277, Patented May 29, 1917.

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CHARLES V. WEIGHT, 015 REYNOLDS, PENNSYLVANIA.

SHAKING-SCBEEN.

Specification of Letters Patent.

PatentedMay 29, 1917.

Application filed October 5, 1916. Serial No. 123,944.

To all whom it may concern:

Be it known that 1, CHARLES V. WRIGHT, a citizen of the United States, and resident of Reynolds, in the county of Schuylkill, and in the State of Pennsylvania, have invented a certain new and useful Improvement in Shaking-Screens, and do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to the plates of shaker screens for washing coal and ores, and generally statedthe object of my invention is to provide a constructionwhich will effect the desired agitation of the material and assure its distribution uniformly over the plate, preventing banking of the material atthe sides, and to this end and for the attainment of other objects, which will be evident to those skilled in the art from the detailed description hereinafter given, my invention consists in the shaker plate having the characteristics of construction substantially as hereinafter specified and claimed.

In the accompanying drawings is illustrated a preferred embodiment of my invention, in which drawings- Figure 1 is a top plan view of a shaker plate embodying my invention;

Fig. 2 is a section on the line 22 of Fig. 1.

I My invention has to do with that type of shaker plate having rifles on its surfaces and perforated for the passage from the plate of fine material. A series of such plates, oblong in form, are placed edge to edge to extend over the desired area,and are supported, as usual, by a suitable framing in a box. I consider it necessary to illustrate my invention to show in the drawings merely one plate, since my invention has to do only with the configuration of the surfaces over which the material passes and has nothing to do with the manner of mounting, or supporting the plates. The plate 10 shown in the drawings, is oblong in form, its longer dimension being crosswise of the direction of travel of the material. As shown in the drawings there are two parallel rows of rifles 11, the rows extending transversely, and the rifles being formed of units that are -shaped with one arm, or leg of the V longer than the other, and the units of a row being so relatively situated that the extremity of the longer leg projects beyond the shorter leg of an adjacent unit. Preferably the rifles of a series upon opposite sides of the median line, considered transversely of the plate, are in re-- versed arrangement, that is to say, the

longer legs of one group of rifles on one side of said median line extend in the same direction as the shorter legs of the other set of rifles on the other side of said median line, and the shorter legs of the rifles of one row extend in the same direction as the longer legs of the rifles of the other row.

Preferably the short leg of a unit joins the long leg a short distance from one end of the leg so that there is a lateral projection 12 at the apex of the V.

r The rifles are formed by corrugating the plate so that they present convexly curved ribs on the materiaLengaging side of the plate, and a substantially fiat, or plane surface is provided around and between the rifles. The apexes of the V-shaped units point in the direction of flow of the material over the plate, so that the legs of each unit converge onward and laterally and there is a more or less open channel afforded between adjacent units in the same row by the rounding of the extremity of a' short leg near the long leg of an adjacent unit as well as by a clear space between such extremity and the adjacent long leg, and the apexes of the units of the first row are to one side of the beginning of the long legs of the units of the next row, so that material passing from the units of the first row is intercepted by the long legs of the units of the second row, and by reason of the inclination inward, or in the opposite direction from that of the long legs of the unit of the first row, the direction of travel of the material is changed so that while moving onward it is also moved inward away from the side of the plate and thus whatever outward tendency might have been imparted to it by the long leg. of the unit of the first row is counteracted. In fact the flow from one unit of the first row is intercepted by the long legs of two adjacent units of the second row.

It will be seen that by reason of the inclination of the legs of each unit with ref erence to each other, the relative arrangement of the units of each row and the relative arrangement of the two rows, coal, for example, in passing over the shaker plate and encountering the rifles, will strike numerous oppositely extending inclined surfaces, reaching transversely across the plate which will subdivide the mass, or stream of material into numerous smaller streams,

which will be confined Within comparatively narrow limits transversely of the plate, while moving freely back and forth transversely, and thus any movement of a substantial body of material toward either side which would result in its banking on either side, is prevented, and a practically uniform distribution of the material over the shaker plate as it passes over the latter will be se-.

- counteract that tendency, and, hence, all the plates, where my invention is employed, may be alike,an obviously important advantage from both the manufacturers and users standpoint.

As shown in Fig. 3 I may employ rifles 13 that are V-shapecl with legs of substantially the same length, and with apexes pointing toward the material as it flows upon the plate, and these rifles may have the double arrangement shown. As their legs diverge outwardly with reference to .the flow of material over the plate they ,act to spread the material laterally as it enters upon the plate to a greater extent than the form of rifles in the first row shown in Fi l.

flaving thus described my invention what I claim is- 1. A shaker plate having rows of rifles composed of oppositely diverging legs, the

" tween the rows of rifles.

2. A shaker plate having rows of rifles composed of oppositely diverging legs, the rows being arranged progressively one after another in the direction of fiow'of material over the plate, andrthe plate having surfaces between the legs of adjacent rifles of the same row and the legs of adjacent rows forming paths for the passage of material between rifles of the same row and between the rows of rifles, said legs being .of imequal length, and the longer leg of one set extending past the shorter leg of an adjacent set.

3. A shaker plate having rows of rifles composed of oppositely diverging legs, the rows being arranged progressively one after another in the direction of flow of material over the plate, and the plate having surfaces between the legs of adjacent rifles of the same row and the legs of adjacent rows forming paths for the passage of material between rifles of the same row and between the rows of rifles, said legs being of unequal length, and the longer leg of one set extending past the shorter leg of an adjacent set, said rifles being arranged in a row formed of groups with the short legs of one group extending in the same direction as the long legs of an adjacent group.

4. A shaker plate having parallel rows of rifles formed of V-shaped units, each unit hav'inga short leg and a long leg, spaces being provided between the units of a row and between the rows of units, that form zigzag paths between adjacent units of the same row and between adjacent rows of units.

5. A shaker plate having parallel rows of rifles formed of V-shaped units, each unit having a short leg and a long leg, spaces being provided between the units of a row and between the rows of units, that form zigzag paths between adjacent units of the same row and between adjacent rows of units, and the long legs of the units of one row extending in the'same direction as the short legs of the units of an adjoinmg row.

.6. A shaker plate having parallel rows of rifles formed of V-shaped units, each unit having a short leg and a long leg,

spaces being provided between the units of a row and between the rows of units, that form zigzag paths between adjacent units of the same row andfbetween adjacent rows of units, the plate having a plane perforated surface between the rows of rifles.

7. Ashaker plate having its top surface over which material flows formed of rifles integral with the plate that are raised above adjacent surfaces of the plate, said rifles being arranged in rows progressively one after another in the direction of flow of material over the plate, the rifles of each row being composed of oppositely diverging legs, the divergence being opposite the direction of flow of material over the plate the rifles of a row being spaced apart and the rows of rifles being spaced apart.

In testimony that I claim the foregoing I have hereunto set my hand.

CHARLES v. WRIGHT.

WVitnesses:

J nun M. KNEPPER, WM. FARBER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

